diff options
Diffstat (limited to 'src/pybind/mgr/rbd_support/trash_purge_schedule.py')
| -rw-r--r-- | src/pybind/mgr/rbd_support/trash_purge_schedule.py | 282 |
1 files changed, 282 insertions, 0 deletions
diff --git a/src/pybind/mgr/rbd_support/trash_purge_schedule.py b/src/pybind/mgr/rbd_support/trash_purge_schedule.py new file mode 100644 index 000000000..abc50ec39 --- /dev/null +++ b/src/pybind/mgr/rbd_support/trash_purge_schedule.py @@ -0,0 +1,282 @@ +import json +import rados +import rbd +import traceback + +from datetime import datetime +from threading import Condition, Lock, Thread +from typing import Any, Dict, List, Optional, Tuple + +from .common import get_rbd_pools +from .schedule import LevelSpec, Schedules + + +class TrashPurgeScheduleHandler: + MODULE_OPTION_NAME = "trash_purge_schedule" + SCHEDULE_OID = "rbd_trash_purge_schedule" + REFRESH_DELAY_SECONDS = 60.0 + + def __init__(self, module: Any) -> None: + self.lock = Lock() + self.condition = Condition(self.lock) + self.module = module + self.log = module.log + self.last_refresh_pools = datetime(1970, 1, 1) + + self.stop_thread = False + self.thread = Thread(target=self.run) + + def setup(self) -> None: + self.init_schedule_queue() + self.thread.start() + + def shutdown(self) -> None: + self.log.info("TrashPurgeScheduleHandler: shutting down") + self.stop_thread = True + if self.thread.is_alive(): + self.log.debug("TrashPurgeScheduleHandler: joining thread") + self.thread.join() + self.log.info("TrashPurgeScheduleHandler: shut down") + + def run(self) -> None: + try: + self.log.info("TrashPurgeScheduleHandler: starting") + while not self.stop_thread: + refresh_delay = self.refresh_pools() + with self.lock: + (ns_spec, wait_time) = self.dequeue() + if not ns_spec: + self.condition.wait(min(wait_time, refresh_delay)) + continue + pool_id, namespace = ns_spec + self.trash_purge(pool_id, namespace) + with self.lock: + self.enqueue(datetime.now(), pool_id, namespace) + + except (rados.ConnectionShutdown, rbd.ConnectionShutdown): + self.log.exception("TrashPurgeScheduleHandler: client blocklisted") + self.module.client_blocklisted.set() + except Exception as ex: + self.log.fatal("Fatal runtime error: {}\n{}".format( + ex, traceback.format_exc())) + + def trash_purge(self, pool_id: str, namespace: str) -> None: + try: + with self.module.rados.open_ioctx2(int(pool_id)) as ioctx: + ioctx.set_namespace(namespace) + rbd.RBD().trash_purge(ioctx, datetime.now()) + except (rados.ConnectionShutdown, rbd.ConnectionShutdown): + raise + except Exception as e: + self.log.error("exception when purging {}/{}: {}".format( + pool_id, namespace, e)) + + def init_schedule_queue(self) -> None: + self.queue: Dict[str, List[Tuple[str, str]]] = {} + # pool_id => {namespace => pool_name} + self.pools: Dict[str, Dict[str, str]] = {} + self.schedules = Schedules(self) + self.refresh_pools() + self.log.debug("TrashPurgeScheduleHandler: queue is initialized") + + def load_schedules(self) -> None: + self.log.info("TrashPurgeScheduleHandler: load_schedules") + self.schedules.load() + + def refresh_pools(self) -> float: + elapsed = (datetime.now() - self.last_refresh_pools).total_seconds() + if elapsed < self.REFRESH_DELAY_SECONDS: + return self.REFRESH_DELAY_SECONDS - elapsed + + self.log.debug("TrashPurgeScheduleHandler: refresh_pools") + + with self.lock: + self.load_schedules() + if not self.schedules: + self.log.debug("TrashPurgeScheduleHandler: no schedules") + self.pools = {} + self.queue = {} + self.last_refresh_pools = datetime.now() + return self.REFRESH_DELAY_SECONDS + + pools: Dict[str, Dict[str, str]] = {} + + for pool_id, pool_name in get_rbd_pools(self.module).items(): + if not self.schedules.intersects( + LevelSpec.from_pool_spec(pool_id, pool_name)): + continue + with self.module.rados.open_ioctx2(int(pool_id)) as ioctx: + self.load_pool(ioctx, pools) + + with self.lock: + self.refresh_queue(pools) + self.pools = pools + + self.last_refresh_pools = datetime.now() + return self.REFRESH_DELAY_SECONDS + + def load_pool(self, ioctx: rados.Ioctx, pools: Dict[str, Dict[str, str]]) -> None: + pool_id = str(ioctx.get_pool_id()) + pool_name = ioctx.get_pool_name() + pools[pool_id] = {} + pool_namespaces = [''] + + self.log.debug("load_pool: {}".format(pool_name)) + + try: + pool_namespaces += rbd.RBD().namespace_list(ioctx) + except rbd.OperationNotSupported: + self.log.debug("namespaces not supported") + except rbd.ConnectionShutdown: + raise + except Exception as e: + self.log.error("exception when scanning pool {}: {}".format( + pool_name, e)) + + for namespace in pool_namespaces: + pools[pool_id][namespace] = pool_name + + def rebuild_queue(self) -> None: + now = datetime.now() + + # don't remove from queue "due" images + now_string = datetime.strftime(now, "%Y-%m-%d %H:%M:00") + + for schedule_time in list(self.queue): + if schedule_time > now_string: + del self.queue[schedule_time] + + if not self.schedules: + return + + for pool_id, namespaces in self.pools.items(): + for namespace in namespaces: + self.enqueue(now, pool_id, namespace) + + self.condition.notify() + + def refresh_queue(self, current_pools: Dict[str, Dict[str, str]]) -> None: + now = datetime.now() + + for pool_id, namespaces in self.pools.items(): + for namespace in namespaces: + if pool_id not in current_pools or \ + namespace not in current_pools[pool_id]: + self.remove_from_queue(pool_id, namespace) + + for pool_id, namespaces in current_pools.items(): + for namespace in namespaces: + if pool_id not in self.pools or \ + namespace not in self.pools[pool_id]: + self.enqueue(now, pool_id, namespace) + + self.condition.notify() + + def enqueue(self, now: datetime, pool_id: str, namespace: str) -> None: + schedule = self.schedules.find(pool_id, namespace) + if not schedule: + self.log.debug( + "TrashPurgeScheduleHandler: no schedule for {}/{}".format( + pool_id, namespace)) + return + + schedule_time = schedule.next_run(now) + if schedule_time not in self.queue: + self.queue[schedule_time] = [] + self.log.debug( + "TrashPurgeScheduleHandler: scheduling {}/{} at {}".format( + pool_id, namespace, schedule_time)) + ns_spec = (pool_id, namespace) + if ns_spec not in self.queue[schedule_time]: + self.queue[schedule_time].append((pool_id, namespace)) + + def dequeue(self) -> Tuple[Optional[Tuple[str, str]], float]: + if not self.queue: + return None, 1000.0 + + now = datetime.now() + schedule_time = sorted(self.queue)[0] + + if datetime.strftime(now, "%Y-%m-%d %H:%M:%S") < schedule_time: + wait_time = (datetime.strptime(schedule_time, + "%Y-%m-%d %H:%M:%S") - now) + return None, wait_time.total_seconds() + + namespaces = self.queue[schedule_time] + namespace = namespaces.pop(0) + if not namespaces: + del self.queue[schedule_time] + return namespace, 0.0 + + def remove_from_queue(self, pool_id: str, namespace: str) -> None: + self.log.debug( + "TrashPurgeScheduleHandler: descheduling {}/{}".format( + pool_id, namespace)) + + empty_slots = [] + for schedule_time, namespaces in self.queue.items(): + if (pool_id, namespace) in namespaces: + namespaces.remove((pool_id, namespace)) + if not namespaces: + empty_slots.append(schedule_time) + for schedule_time in empty_slots: + del self.queue[schedule_time] + + def add_schedule(self, + level_spec: LevelSpec, + interval: str, + start_time: Optional[str]) -> Tuple[int, str, str]: + self.log.debug( + "TrashPurgeScheduleHandler: add_schedule: level_spec={}, interval={}, start_time={}".format( + level_spec.name, interval, start_time)) + + # TODO: optimize to rebuild only affected part of the queue + with self.lock: + self.schedules.add(level_spec, interval, start_time) + self.rebuild_queue() + return 0, "", "" + + def remove_schedule(self, + level_spec: LevelSpec, + interval: Optional[str], + start_time: Optional[str]) -> Tuple[int, str, str]: + self.log.debug( + "TrashPurgeScheduleHandler: remove_schedule: level_spec={}, interval={}, start_time={}".format( + level_spec.name, interval, start_time)) + + # TODO: optimize to rebuild only affected part of the queue + with self.lock: + self.schedules.remove(level_spec, interval, start_time) + self.rebuild_queue() + return 0, "", "" + + def list(self, level_spec: LevelSpec) -> Tuple[int, str, str]: + self.log.debug( + "TrashPurgeScheduleHandler: list: level_spec={}".format( + level_spec.name)) + + with self.lock: + result = self.schedules.to_list(level_spec) + + return 0, json.dumps(result, indent=4, sort_keys=True), "" + + def status(self, level_spec: LevelSpec) -> Tuple[int, str, str]: + self.log.debug( + "TrashPurgeScheduleHandler: status: level_spec={}".format( + level_spec.name)) + + scheduled = [] + with self.lock: + for schedule_time in sorted(self.queue): + for pool_id, namespace in self.queue[schedule_time]: + if not level_spec.matches(pool_id, namespace): + continue + pool_name = self.pools[pool_id][namespace] + scheduled.append({ + 'schedule_time': schedule_time, + 'pool_id': pool_id, + 'pool_name': pool_name, + 'namespace': namespace + }) + return 0, json.dumps({'scheduled': scheduled}, indent=4, + sort_keys=True), "" |